code: def test_forward(self):
      outputs = self.head(self.inputs)
      assert outputs.shape == (4, 32)
  
file_path: mmdetection/tests/test_models/test_reid/test_linear_reid_head.py
imports: from unittest import TestCase
  import torch
  from mmdet.registry import MODELS
  from mmdet.structures import ReIDDataSample
  from mmdet.utils import register_all_modules
label_desc: Use image node_id 2 for calling the TestLinearReIDHead obj's underlying member method code with example usage: obj.test_forward() without return types